CN104829159A - A slow-release controllable polycarboxylic acid water reducer specially used for self-compacting concrete for CRTSIII type plates - Google Patents
A slow-release controllable polycarboxylic acid water reducer specially used for self-compacting concrete for CRTSIII type plates Download PDFInfo
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- CN104829159A CN104829159A CN201510131305.0A CN201510131305A CN104829159A CN 104829159 A CN104829159 A CN 104829159A CN 201510131305 A CN201510131305 A CN 201510131305A CN 104829159 A CN104829159 A CN 104829159A
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 69
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 239000011376 self-consolidating concrete Substances 0.000 title claims abstract description 56
- 239000002253 acid Substances 0.000 title abstract 6
- 239000004567 concrete Substances 0.000 claims abstract description 28
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 20
- 239000013530 defoamer Substances 0.000 claims abstract description 9
- 239000013008 thixotropic agent Substances 0.000 claims abstract description 9
- 230000009974 thixotropic effect Effects 0.000 claims abstract description 8
- 239000003381 stabilizer Substances 0.000 claims abstract description 7
- 239000007791 liquid phase Substances 0.000 claims abstract description 3
- 239000012452 mother liquor Substances 0.000 claims description 37
- 229920005646 polycarboxylate Polymers 0.000 claims description 27
- 238000013268 sustained release Methods 0.000 claims description 24
- 239000012730 sustained-release form Substances 0.000 claims description 24
- 230000003467 diminishing effect Effects 0.000 claims description 16
- 150000002170 ethers Chemical class 0.000 claims description 10
- 239000012141 concentrate Substances 0.000 claims description 8
- 239000008030 superplasticizer Substances 0.000 claims description 8
- 238000013270 controlled release Methods 0.000 claims description 5
- LVHBHZANLOWSRM-UHFFFAOYSA-N itaconic acid Chemical compound OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 claims description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- 150000002148 esters Chemical class 0.000 claims description 4
- -1 retardant Substances 0.000 claims description 3
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 claims description 2
- XUIKGJQOQAHGQE-UHFFFAOYSA-N CC(=CC)[Na] Chemical compound CC(=CC)[Na] XUIKGJQOQAHGQE-UHFFFAOYSA-N 0.000 claims description 2
- RSWGJHLUYNHPMX-ONCXSQPRSA-N abietic acid Chemical compound C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C(O)=O RSWGJHLUYNHPMX-ONCXSQPRSA-N 0.000 claims description 2
- 239000003570 air Substances 0.000 claims description 2
- 150000001408 amides Chemical class 0.000 claims description 2
- 239000000440 bentonite Substances 0.000 claims description 2
- 229910000278 bentonite Inorganic materials 0.000 claims description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 2
- 150000001720 carbohydrates Chemical class 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 2
- 229920003086 cellulose ether Polymers 0.000 claims description 2
- 230000003750 conditioning effect Effects 0.000 claims description 2
- 239000000470 constituent Substances 0.000 claims description 2
- 238000007334 copolymerization reaction Methods 0.000 claims description 2
- 150000002191 fatty alcohols Chemical class 0.000 claims description 2
- 150000002632 lipids Chemical class 0.000 claims description 2
- 239000003607 modifier Substances 0.000 claims description 2
- 150000003016 phosphoric acids Chemical class 0.000 claims description 2
- 229920000151 polyglycol Polymers 0.000 claims description 2
- 239000010695 polyglycol Substances 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 2
- 235000015320 potassium carbonate Nutrition 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- DAJSVUQLFFJUSX-UHFFFAOYSA-M sodium;dodecane-1-sulfonate Chemical compound [Na+].CCCCCCCCCCCCS([O-])(=O)=O DAJSVUQLFFJUSX-UHFFFAOYSA-M 0.000 claims description 2
- 150000005846 sugar alcohols Polymers 0.000 claims description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 2
- 150000008130 triterpenoid saponins Chemical class 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 23
- 238000000034 method Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000002360 preparation method Methods 0.000 abstract description 5
- 238000013329 compounding Methods 0.000 abstract description 2
- 239000004594 Masterbatch (MB) Substances 0.000 abstract 4
- 239000004568 cement Substances 0.000 abstract 1
- 239000006260 foam Substances 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000004574 high-performance concrete Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000004642 transportation engineering Methods 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A preparing method of a slow-release controllable polycarboxylic acid water reducer specially used for self-compacting concrete for CRTSIII type plates is disclosed. The water reducer is prepared by compounding highly-water-reducing type polycarboxylic acid water reducer master batch, I type slow-release polycarboxylic acid water reducer master batch, 2 type slow-release polycarboxylic acid water reducer master batch, 3 type slow-release polycarboxylic acid water reducer master batch, a slow release controlling agent, a retarder, a liquid phase concrete thixotropic agent, a foam stabilizer, a defoamer and an air entraining agent. The water reducer specially used for self-compacting concrete is provided, reduces sensitivity of water using amounts of concrete, improves system performance stability, reduces thixotropic changes and has technical advantages of high water reduction rate, low doping amount, high cement variety adaptability, and the like. Construction difficulties of the self-compacting concrete for the CRTSIII type plates are completely overcome, construction and operation time of concrete is prolonged, and the problem that the self-compacting concrete is high in loss in a construction process is overcome, so that preparation and construction costs of the self-compacting concrete are largely reduced and economic benefit is obvious.
Description
Technical field
The invention belongs to technical field of concrete additives, be specifically related to a kind of preparation of CRTS III template self-compacting concrete special slow release controllable type polycarboxylate water-reducer.
Background technology
Self-compacting concrete (SCC) has excellent serviceability, avoids vibrating, easy construction, becomes one of focus paid close attention in technology of high performance concrete field.Compared with conventional concrete, self-compacting concrete has excellent mobility, vibrates can realize self-compacting mold filling without the need to external force; It also has good education resistance energy and gap through performance simultaneously, is convenient to the construction of intensive reinforced components, thin-wall member and concealed work, and after ensure that construction, concrete compaction is even, improves its mechanical property and weather resistance; Due to its self-compacting characteristic, reduce concrete spouting Construction control difficulty, save a large amount of artificial and equipment cost.Therefore self-compacting concrete has huge economic benefit.
One of core technology of CRTS III plate-type non-fragment orbit, using self-compacting concrete as filling bed material, given full play to that self-compacting concrete mobility is large, system stability be strong, gap handling capacity is good, convergent-divergent is consistent with main structure body, the technical superiority of good endurance, for realize high railway knowledge technology property right completely sinicization in play the important and pivotal role.And during practice of construction, the problems such as construction environment temperature contrast is large, the concrete mixing transport engineering time is long, construction emergency case is many cannot be returned, require that self-compacting concrete mobility and system stability reach 5h when can keep, to increase construction operation time, reduce the loss caused because of material property loss, reduce construction cost, there is huge economic benefit.
Current domestic admixture synthesis and compounding process not yet realize diminishing efficiency regularity release under condition of different temperatures, self-compacting concrete high temperature long time protect collapse, concrete thixotroping is stable and the reinforcement of concrete water yield susceptibility is low.The preparation method of the special water reducer of a kind of ballastless track of high-speed railway self-compacting concrete is disclosed in CN103086634B, self-compacting concrete mobility prepared by the method keeps duration to be 4h, but unresolved concrete thixotropic property is stable and water consumption sensitive issue, more not by the functionalized design of mother liquor molecular structure, form the response pattern of diminishing efficiency to pH value and envrionment temperature and discharge; A kind of preparation method of special additive for self-dense concrete is disclosed in CN100545120C, although improve rheological characteristics and the volume stability characteristic of self-compacting concrete, but use naphthalene system mother liquor, do not meet the requirement of railway high performance additive mandatory use poly carboxylic acid.These admixtures only stress the lifting to a certain performance of self-compacting concrete, the requirement of CRTSS III template filling bed construction to Performance of Self-compacting Concrete can not be met comprehensively, low divergence (600 ~ 630mm) self-compacting concrete reaches 5h when arbitrary temperature (0 ~ 35 DEG C) condition current downflow keeps, process entails the reinforcement of concrete water yield susceptibility is low, system stable performance, and thixotroping change is little.
Summary of the invention
The construction difficult problem of self-compacting concrete in what the present invention will solve is exactly CRTS III template filling bed and other thin-wall constructions, there is provided a kind of slowly-releasing controllable type self-compacting concrete special water reducer, science to multiple slowly-releasing mother liquor, thixotropic agent and slowly-releasing control agent composite usage, realize the release of diminishing component regularity, in maintenance system, diminishing component diminishing efficiency is constant, ensure that self-compacting concrete can (600-630mm) 5h mobility free of losses at arbitrary temperature (0-35 DEG C) and low divergence condition, have the multi-functional improving concrete thixotropic behavior and improve slurry system stability concurrently simultaneously.Technical guarantee is provided for preparing the concrete that arbitrary temperature current downflow hold-time is long, water consumption susceptibility is low and thixotropic property is stable.
The present invention by the following technical solutions for achieving the above object
A kind of CRTS III template self-compacting concrete special slow release controllable type polycarboxylate water-reducer, it is characterized in that: described water reducer is by high water reducing type polycarboxylate superplasticizer mother liquor, 1 type sustained-release polycarboxylic water reducer mother liquor, 2 type sustained-release polycarboxylic water reducer mother liquors, 3 type sustained-release polycarboxylic water reducer mother liquors, control agent, retardant, liquid phase concrete thixotropic agent, suds-stabilizing agent, defoamer and air entrapment agent is composite forms, and each component effective constituent proportioning is: high water reducing type polycarboxylate superplasticizer mother liquor 3.0 ~ 5.0%; 1 type sustained-release polycarboxylic water reducer mother liquor 2.0 ~ 4.0%; 2 type sustained-release polycarboxylic water reducer mother liquors 2.0 ~ 3.0%; 3 type sustained-release polycarboxylic water reducer mother liquors 1.0 ~ 3.0%; Controlled release agent 0 ~ 0.02%; Retardant 0 ~ 3.0%; Concrete thixotropic agent conditioning agent 0 ~ 0.05%, suds-stabilizing agent 0.05 ~ 0.1%; Defoamer 0 ~ 0.07%, air entrapment agent 0 ~ 0.01% all the other be water.
Described a kind of CRTS III template self-compacting concrete special slow release controllable type polycarboxylate water-reducer, it is characterized in that: described high water reducing type polycarboxylate superplasticizer mother liquor refers to and utilizes poly glycol monomethyl ether maleic anhydride surface-active macromonomer, methylpropenyl sodium sulfonate (SMAS), methylene-succinic acid (ITA) for raw material is through free radicals copolymerization reaction acquisition ester class polycarboxylate superplasticizer mother liquor, referenced patent ZL201010515271.
Described a kind of CRTS III template self-compacting concrete special slow release controllable type polycarboxylate water-reducer, is characterized in that: 1 described type sustained-release polycarboxylic water reducer mother liquor refers to and obtains ethers sustained-release polycarboxylic water reducer mother liquor by polymerized at normal temperature; 0 ~ 35 DEG C of temperature range, initial water-reducing rate is extremely low, and after contact alkaline condition, mother liquor diminishing component concentrates on 1 ~ 2h slow releasing, referenced patent ZL201010515356.
Described a kind of CRTS III template self-compacting concrete special slow release controllable type polycarboxylate water-reducer, is characterized in that: 2 described type sustained-release polycarboxylic water reducer mother liquors refer to: obtain ethers sustained-release polycarboxylic water reducer mother liquor by polymerized at normal temperature; 0 ~ 35 DEG C of temperature range, initial water-reducing rate is extremely low, and after contact alkaline condition, mother liquor diminishing component concentrates on 2 ~ 4h slow releasing, refers to patent CN201410624218.
Described a kind of CRTS III template self-compacting concrete special slow release controllable type polycarboxylate water-reducer, is characterized in that: 3 described type sustained-release polycarboxylic water reducer mother liquors refer to: obtain ethers sustained-release polycarboxylic water reducer mother liquor by polymerized at normal temperature; 0 ~ 35 DEG C of temperature range, initial water-reducing rate is extremely low, and after contact alkaline condition, mother liquor diminishing component concentrates on 4 ~ 5h slow releasing, refers to patent CN201410597709.
Described a kind of CRTS III template self-compacting concrete special slow release controllable type polycarboxylate water-reducer, is characterized in that: Controlled release agent comprises the one in sodium carbonate and salt of wormwood.
Described a kind of CRTS III template self-compacting concrete special slow release controllable type polycarboxylate water-reducer, is characterized in that: retardant comprise carbohydrate or polyalcohols, phosphoric acid salt, hydroxycarboxylic acid and its esters one or more.Described a kind of CRTS III template self-compacting concrete special slow release controllable type polycarboxylate water-reducer, is characterized in that: thixotropic modifier comprises the one in polymeric amide and organic bentonite.
Described a kind of CRTS III template self-compacting concrete special slow release controllable type polycarboxylate water-reducer, is characterized in that: suds-stabilizing agent comprise in cellulose ethers and fatty alcohol one or both.
Described a kind of CRTS III template self-compacting concrete special slow release controllable type polycarboxylate water-reducer, is characterized in that: defoamer comprise ethers, silicone based or lipid defoamer one or more.
Described a kind of CRTS III template self-compacting concrete special slow release controllable type polycarboxylate water-reducer, is characterized in that: air entrapment agent comprise in sodium laurylsulfonate, triterpenoid saponin, colophonium pyrolytic polymer and ethers air entrapment agent one or more.
The present invention, compared with prior art achievement, has following positive achievement:
(1) apply 1 type, 2 types are different with the release timeliness of 3 type slowly-releasing poly carboxylic acid mother liquors, according to on-the-spot starting material " time-adsorptive capacity " curve to water reducer, distribute the compound proportion of high diminishing poly carboxylic acid mother liquor and 3 kinds of slowly-releasing poly carboxylic acid mother liquors pointedly, make " time-adsorptive capacity " curve of " time-slowly-releasing amount " curve of slowly-releasing mother liquor in compound system and water reducer consistent, ensure absorption consumption and the running balance of slowly-releasing burst size, maintenance system diminishing efficiency is constant, thus reaches 5h when ensureing that self-compacting concrete mobility keeps.
(2) the 3 kinds of model slowly-releasing poly carboxylic acid mother liquors used, all according to advanced molecular structure function design theory, different according to construction temperature, devise side chain lengths, eluting group kind and quantity pointedly, under ensureing 0 ~ 35 DEG C of temperature range condition, mother liquor diminishing component concentrates on section slow releasing sometime, and overcoming common polycarboxylate water-reducer performance affects large problem by temperature and time.
(3) the poly carboxylic acid mother liquor used is all obtained by polymerized at normal temperature, and environmental protection, saves a large amount of energy consumptions, have obvious social and economic benefits.
(4) creationary introducing Controlled release agent, for release sustaining component release provides a stable pH value environment, ensures the release that slowly-releasing poly carboxylic acid mother liquor can be stable in order, thus stable when ensureing water-reducing effect long.
(5) in the additive complex stage, namely thixotropic agent is dissolved in, thixotropic agent can be mixed with slurry at concrete preparatory phase, given full play to thixotropic agent for the effect improving self-compacting concrete thixotropic behavior, ensure that concrete is stablized at constructing operation stage thixotropic behavior.
(6) each mother liquor diminishing usefulness used is stablized, and water consumption susceptibility is low, introduces simultaneously and surely steeps component, thoroughly solves the problem of self-compacting concrete system stability difference.
(7) by a kind of interpolation of composite finished product admixture, just disposable low divergence (600 ~ 630mm) self-compacting concrete that realizes reaches 5h when arbitrary temperature (0 ~ 35 DEG C) condition current downflow keeps, low, the system stable performance of the reinforcement of concrete water yield susceptibility in process, thixotroping change is little.Solve the construction difficult problem of CRTS III template filling bed self-compacting concrete, for the construction of its high quality provides technical guarantee comprehensively.
(8) 1 type slow release type, 2 type slow release types, the 3 type slow release type type polycarboxylate water-reducers of the production of Anhui Zhong Ti engineering materials Science and Technology Ltd., devise the ethers poly carboxylic acid mother liquor of side chain lengths, eluting group kind and quantity targetedly, 0 ~ 35 DEG C of temperature range, initial water-reducing rate is extremely low, after contact alkaline condition, mother liquor diminishing component concentrates on 1 ~ 2h, 2 ~ 4h, 4 ~ 5h slow releasing respectively.
(9) the present invention solves the construction difficult problem of CRTS III template filling bed self-compacting concrete comprehensively, extend the concrete construction operating time, solve the problem that self-compact concrete in construction process loss rate is large, significantly reduce self-compacting concrete preparation construction cost, remarkable in economical benefits.
Embodiment
Embodiment 1
Water reducer compound proportion is as follows:
Mixing self-compacting concrete collaboration such as table 1.
Table 1 is tested with mix parameters of high-strength self-compacting concrete (units/kg/m
3)
To adopt in embodiment 1 in water reducer and table 1 concrete proportioning mixing Performance of Self-compacting Concrete as table 2.
Table 2 adopts the Performance of Self-compacting Concrete of water reducer in embodiment 1
Embodiment 2
Water reducer compound proportion is as follows:
To adopt in embodiment 2 concrete proportioning mixing self-compacting concrete in water reducer and table 1, performance is as table 3.
Table 3 adopts the Performance of Self-compacting Concrete of water reducer in embodiment 2
Embodiment 3
Water reducer compound proportion is as follows:
To adopt in embodiment 3 concrete proportioning mixing self-compacting concrete in water reducer and table 1, performance is as table 4.
Table 4 adopts the Performance of Self-compacting Concrete of water reducer in embodiment 3
Embodiment 4
Water reducer compound proportion is as follows:
To adopt in embodiment 4 concrete proportioning mixing self-compacting concrete in water reducer and table 1, performance is as table 5.
Table 5 adopts the Performance of Self-compacting Concrete of water reducer in embodiment 4
Claims (4)
1. a CRTS III template self-compacting concrete special slow release controllable type polycarboxylate water-reducer, it is characterized in that: described water reducer is by high water reducing type polycarboxylate superplasticizer mother liquor, 1 type sustained-release polycarboxylic water reducer mother liquor, 2 type sustained-release polycarboxylic water reducer mother liquors, 3 type sustained-release polycarboxylic water reducer mother liquors, control agent, retardant, liquid phase concrete thixotropic agent, suds-stabilizing agent, defoamer and air entrapment agent is composite forms, and each component effective constituent proportioning is: high water reducing type polycarboxylate superplasticizer mother liquor 3.0 ~ 5.0%; 1 type sustained-release polycarboxylic water reducer mother liquor 2.0 ~ 4.0%; 2 type sustained-release polycarboxylic water reducer mother liquors 2.0 ~ 3.0%; 3 type sustained-release polycarboxylic water reducer mother liquors 1.0 ~ 3.0%; Controlled release agent 0 ~ 0.02%; Retardant 0 ~ 3.0%; Concrete thixotropic agent conditioning agent 0 ~ 0.05%, suds-stabilizing agent 0.05 ~ 0.1%; Defoamer 0 ~ 0.07%, air entrapment agent 0 ~ 0.01% all the other be water.
2. a kind of CRTS III template self-compacting concrete special slow release controllable type polycarboxylate water-reducer according to claim 1, is characterized in that: described high water reducing type polycarboxylate superplasticizer mother liquor refers to and utilizes poly glycol monomethyl ether maleic anhydride surface-active macromonomer, methylpropenyl sodium sulfonate, methylene-succinic acid for raw material is through free radicals copolymerization reaction acquisition ester class polycarboxylate superplasticizer mother liquor.
3. a kind of CRTS III template self-compacting concrete special slow release controllable type polycarboxylate water-reducer according to claim 1, is characterized in that:
1 described type sustained-release polycarboxylic water reducer mother liquor refers to and obtains ethers sustained-release polycarboxylic water reducer mother liquor by polymerized at normal temperature; 0 ~ 35 DEG C of temperature range, initial water-reducing rate is extremely low, and after contact alkaline condition, mother liquor diminishing component concentrates on 1 ~ 2h slow releasing;
2 described type sustained-release polycarboxylic water reducer mother liquors refer to: obtain ethers sustained-release polycarboxylic water reducer mother liquor by polymerized at normal temperature; 0 ~ 35 DEG C of temperature range, initial water-reducing rate is extremely low, and after contact alkaline condition, mother liquor diminishing component concentrates on 2 ~ 4h slow releasing;
3 described type sustained-release polycarboxylic water reducer mother liquors refer to: obtain ethers sustained-release polycarboxylic water reducer mother liquor by polymerized at normal temperature; 0 ~ 35 DEG C of temperature range, initial water-reducing rate is extremely low, and after contact alkaline condition, mother liquor diminishing component concentrates on 4 ~ 5h slow releasing.
4. a kind of CRTS III template self-compacting concrete special slow release controllable type polycarboxylate water-reducer according to claim 1, is characterized in that: Controlled release agent comprises the one in sodium carbonate and salt of wormwood;
Retardant comprise carbohydrate or polyalcohols, phosphoric acid salt, hydroxycarboxylic acid and its esters one or more;
Thixotropic modifier comprises the one in polymeric amide and organic bentonite;
Suds-stabilizing agent comprise in cellulose ethers and fatty alcohol one or both;
Defoamer comprise ethers, silicone based or lipid defoamer one or more;
Air entrapment agent comprise in sodium laurylsulfonate, triterpenoid saponin, colophonium pyrolytic polymer and ethers air entrapment agent one or more.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105293987A (en) * | 2015-11-23 | 2016-02-03 | 中国建筑材料科学研究总院 | Poly carboxylic acid series compound water reducing agent used for hydraulic self-compacting concrete and preparation method and application |
| CN105439502A (en) * | 2015-10-22 | 2016-03-30 | 中铁四局集团有限公司 | Self-compacting concrete for CRTS III slab ballastless track filling layer and preparation method thereof |
| CN106186782A (en) * | 2016-07-02 | 2016-12-07 | 曹平 | A kind of concrete retarding water reducer |
| CN106587706A (en) * | 2016-12-07 | 2017-04-26 | 湖北工业大学 | High self-compaction and reciprocity polycarboxylic acid water reducing agent composition for concrete |
| CN109231874A (en) * | 2018-09-21 | 2019-01-18 | 佛山齐安建筑科技有限公司 | A kind of concrete air-entrainer and preparation method thereof |
| CN110938176A (en) * | 2018-09-25 | 2020-03-31 | 中建材中岩科技有限公司 | Super-long slump loss resistant cement-based polycarboxylate superplasticizer mother liquor and application thereof |
| CN111362612A (en) * | 2018-12-26 | 2020-07-03 | 江苏苏博特新材料股份有限公司 | Polycarboxylate superplasticizer special for rock-fill dam C15 self-compacting concrete |
| CN112592138A (en) * | 2020-12-31 | 2021-04-02 | 中铁十局集团有限公司 | Single-component active synchronous mortar with controllable setting time and preparation method thereof |
| CN115073041A (en) * | 2021-03-11 | 2022-09-20 | 北京都市绿源环保科技有限公司 | Additive for controllable low-strength backfill material and preparation method thereof |
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| CN103086634A (en) * | 2013-01-22 | 2013-05-08 | 中铁五局（集团）有限公司 | Water reducing agent special for high-speed railway ballastless track self-compacting concrete |
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